Respiration mask



FIG. 1 is a rear perspective view thereof;

FIG. 2 is a bottom view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is an opposite side view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a front view thereof.

The illustrated design is not limited to the scale shown. 

The ornamental design for a respiration mask, as shown and described. 